Calculation method and system for load margin of electrical coupling system based on continuous multi-energy flow

Abstract

The invention discloses a load margin calculation method and system of an electrical coupling system based on continuous multi-energy flow. The traditional load margin calculation does not take into account the primary energy supply of the gas generator set and the operating constraints of the natural gas system. The technical solution adopted by the present invention includes: establishing a multi-energy flow model considering the safety constraints of the electrical coupling system, including the multi-energy flow model of the natural gas system, the electric power system and the gas generating set; imitating the continuous flow, introducing load growth parameters, and proposing a continuous multi-energy The flow calculation method is used to solve the relationship curve between the gas network node pressure, the grid node voltage and the load margin, and calculate the system load margin. The method of the present invention can determine the load margin of the electrical coupling system, analyzes the impact of the natural gas system safety constraints on the load margin, provides a reference for the adjustment of the operating state of the natural gas system, and is of great significance to the online evaluation of the static stability of the system, which is helpful The system dispatcher monitors the stability of the system operation.

Description

technical field [0001] The invention belongs to the technical field of power system voltage stability index optimization, and in particular relates to a load margin calculation method and system for an electrical coupling system based on continuous multi-energy flow. Background technique [0002] In recent years, the share of natural gas-fired units (NGUs) in the power system has been continuously increasing due to their good economy, fast adjustment ability and low pollution emission characteristics. With the rapid increase of the power generation share of gas-fired units, electric power systems (EPSs) and natural gas systems (NGSs) have gradually formed a unified integrated system-electrically coupled system (IEGS). Therefore, as the coupling becomes tighter, the interaction effects between different energy supply systems should be closely monitored. [0003] At present, relevant research work on IEGS has been carried out at home and abroad: some studies use P2G technolog...

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Problems solved by technology

[0007] The purpose of the present invention is to provide a method and system for calculating the load margin of an electrical coupling system based on continuous multi-energy flow, so as to solve the problem that the traditional load margin calculation does not consider the primary energy supply of NGU and the operating constraints of the natural gas system. Improper problem, realize accurate calculation of power system load margin under the background of deep coupling of power system and natural gas system, to optimize online evaluation of system static stability, and improve the ability of static stability analysis of electrical coupling system

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